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经营范围
发明名称
Film and slide projector mechanism having unitary cabinet means and screen
摘要
申请公布号
US2485709(A)
申请公布日期
1949.10.25
申请号
US19460707657
申请日期
1946.11.04
申请人
THE JAM HANDY ORGANIXATION, INC.
发明人
DAVOCK ALFRED M.
分类号
G03B21/10
主分类号
G03B21/10
代理机构
代理人
主权项
地址
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